ӣţţ¼  ţţ  ţţ  ţţ¼  ţţ  ţţ½  ţţ½  ţţ¼  ţţô  ţţ½  ţţ½  ţţ  ţţô  ţţ½  ţţ  ţţ¼  ţţ  ţţ½  ţţ¼  ţţ